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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Jason Anderson @diurnalist
*/
"use strict";
const REGEXP_HASH = /\[hash(?::(\d+))?\]/gi,
REGEXP_CHUNKHASH = /\[chunkhash(?::(\d+))?\]/gi,
REGEXP_NAME = /\[name\]/gi,
REGEXP_ID = /\[id\]/gi,
REGEXP_FILE = /\[file\]/gi,
REGEXP_QUERY = /\[query\]/gi,
REGEXP_FILEBASE = /\[filebase\]/gi;
// Using global RegExp for .test is dangerous
// We use a normal RegExp instead of .test
const REGEXP_HASH_FOR_TEST = new RegExp(REGEXP_HASH.source, "i"),
REGEXP_CHUNKHASH_FOR_TEST = new RegExp(REGEXP_CHUNKHASH.source, "i"),
REGEXP_NAME_FOR_TEST = new RegExp(REGEXP_NAME.source, "i");
// TODO: remove in webpack 3
// Backwards compatibility; expose regexes on Template object
const Template = require("./Template");
Template.REGEXP_HASH = REGEXP_HASH;
Template.REGEXP_CHUNKHASH = REGEXP_CHUNKHASH;
Template.REGEXP_NAME = REGEXP_NAME;
Template.REGEXP_ID = REGEXP_ID;
Template.REGEXP_FILE = REGEXP_FILE;
Template.REGEXP_QUERY = REGEXP_QUERY;
Template.REGEXP_FILEBASE = REGEXP_FILEBASE;
const withHashLength = (replacer, handlerFn) => {
return function(_, hashLength) {
const length = hashLength && parseInt(hashLength, 10);
if(length && handlerFn) {
return handlerFn(length);
}
const hash = replacer.apply(this, arguments);
return length ? hash.slice(0, length) : hash;
};
};
const getReplacer = (value, allowEmpty) => {
return function(match) {
// last argument in replacer is the entire input string
const input = arguments[arguments.length - 1];
if(value === null || value === undefined) {
if(!allowEmpty) throw new Error(`Path variable ${match} not implemented in this context: ${input}`);
return "";
} else {
return `${value}`;
}
};
};
const replacePathVariables = (path, data) => {
const chunk = data.chunk;
const chunkId = chunk && chunk.id;
const chunkName = chunk && (chunk.name || chunk.id);
const chunkHash = chunk && (chunk.renderedHash || chunk.hash);
const chunkHashWithLength = chunk && chunk.hashWithLength;
if(data.noChunkHash && REGEXP_CHUNKHASH_FOR_TEST.test(path)) {
throw new Error(`Cannot use [chunkhash] for chunk in '${path}' (use [hash] instead)`);
}
return path
.replace(REGEXP_HASH, withHashLength(getReplacer(data.hash), data.hashWithLength))
.replace(REGEXP_CHUNKHASH, withHashLength(getReplacer(chunkHash), chunkHashWithLength))
.replace(REGEXP_ID, getReplacer(chunkId))
.replace(REGEXP_NAME, getReplacer(chunkName))
.replace(REGEXP_FILE, getReplacer(data.filename))
.replace(REGEXP_FILEBASE, getReplacer(data.basename))
// query is optional, it's OK if it's in a path but there's nothing to replace it with
.replace(REGEXP_QUERY, getReplacer(data.query, true));
};
class TemplatedPathPlugin {
apply(compiler) {
compiler.plugin("compilation", compilation => {
const mainTemplate = compilation.mainTemplate;
mainTemplate.plugin("asset-path", replacePathVariables);
mainTemplate.plugin("global-hash", function(chunk, paths) {
const outputOptions = this.outputOptions;
const publicPath = outputOptions.publicPath || "";
const filename = outputOptions.filename || "";
const chunkFilename = outputOptions.chunkFilename || outputOptions.filename;
if(REGEXP_HASH_FOR_TEST.test(publicPath) || REGEXP_CHUNKHASH_FOR_TEST.test(publicPath) || REGEXP_NAME_FOR_TEST.test(publicPath))
return true;
if(REGEXP_HASH_FOR_TEST.test(filename))
return true;
if(REGEXP_HASH_FOR_TEST.test(chunkFilename))
return true;
if(REGEXP_HASH_FOR_TEST.test(paths.join("|")))
return true;
});
mainTemplate.plugin("hash-for-chunk", function(hash, chunk) {
const outputOptions = this.outputOptions;
const chunkFilename = outputOptions.chunkFilename || outputOptions.filename;
if(REGEXP_CHUNKHASH_FOR_TEST.test(chunkFilename))
hash.update(JSON.stringify(chunk.getChunkMaps(true, true).hash));
if(REGEXP_NAME_FOR_TEST.test(chunkFilename))
hash.update(JSON.stringify(chunk.getChunkMaps(true, true).name));
});
});
}
}
module.exports = TemplatedPathPlugin;
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